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During the last week, Sumpter Elementary 5th graders and I have been conducting global warming experiments. Because two of our experiments involve ice melt, I went back to the 4AR to look at estimated contribution to sea level. To my surprise, the Himalayan ice melt has been the biggest contributor and is likely to be in the future (but remember, the Greenland and Antarctic ice sheets were omitted from the predictions because of the wide range of uncertainty -- and have according to recent studies been melting faster than the top of the range). So, the news that the Tibetan glaciers are melting faster than expected doesn't surprise me. Tibetan glaciers melt